Application of PIV-based Pressure Field Estimation for Wind Tunnel and Water Tank Experiments

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  • MURAI Yuichi
    北海道大学工学研究院 機械・宇宙航空工学部門
  • TASAKA Yuji
    北海道大学工学研究院 機械・宇宙航空工学部門
  • PARK Jin
    北海道大学工学研究院 機械・宇宙航空工学部門

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  • PIVによる圧力場計測の風洞実験・水槽実験への応用
  • PIV ニ ヨル アツリョクジョウ ケイソク ノ フウドウ ジッケン ・ スイソウ ジッケン エ ノ オウヨウ

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Abstract

<p>　　　PIV expands its function from fluid velocity measurement to estimation of pressure, incorporating governing equations of flow. In this article, basic principle and applied algorithm of pressure field estimation from PIV data is explained. Since PIV has poor velocity resolution, use of differential equation encounters severe errors amplified. Several velocity-data filtering techniques are elaborated to overcome the error propagation in pressure field. As its applications, various type of pressure fields of a flow around a body are presented, including airfoil with surface jet, a Darrieus turbine blade, hydrofoil close to a free surface, and Savonius turbines.</p>

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